White-light pB images observed from LASCO C2/SOHO (a) and COR1/STEREO-A (d) on June 30, 2019, corresponding pB images synthesised from simulation results (b, e), these synthesised images range from 2.3 to 6R_s on the meridian plane of ϕ_long = 250° − 70° (b) and range from 1.4 to 4R_s on the meridian plane of ϕ_long = 160° − 340° (e), respectively, and 2 D simulated magnetic field lines from 1 to 5 R_s on these two selected meridian planes (c, f).